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The parents of David Pregerson reacted to the news of an arrest in their son's death nearly five months after he was killed on a Pacific Palisades roadway. Beverly White reports for the NBC4 News at 11 p.m. Friday, May 2, 2014. (Published Saturday, May 3, 2014)

Updated at 6:37 AM PDT on Saturday, May 3, 2014

After a four-month investigation into the hit-and-run crash that killed a 23-year-old aspiring filmmaker in the Pacific Palisades, police this week announced the arrest of a suspect.

"I'm grateful to, really the dedication that we've seen from the police,” the victim’s mother Sharon Pregerson said.

David Pregerson was struck by a vehicle around 3 a.m. Dec. 27 near the intersection of Chautauqua Boulevard and Borgos Place while walking home from a bar. He died four days later at a hospital. David Pregerson graduated from UCLA and was the son of a federal judge.

"I believe in our system. I know they've arrested a suspect, and we’ll just let that system play out. It's a good system," the victim’s father Dean Pregerson said.

The suspect, 66-year-old Michael Vuong, was arrested Thursday and will be arraigned Monday. Vuong is a resident of the Palms area of Los Angeles.

The Pregersons and Councilman Mike Bonin had offered a $100,000 reward for information leading to the arrest of a suspect. It is unclear if the reward led to the arrest of Vuong.

"This incident happened in the dead of night. And there were no witnesses. So it really took a combined effort," Bonin said. "So many of our hit-and-runs never get solved. And people in the Palisades really wanted justice for David Pregerson and for his family."

The Pregersons said their support system has been vital in getting through the death of their son.

"I have boxes of letters from people, so I think that we live in a wonderful community, "Dean Pregerson said. "In the end when you lose a child, you know, you start realizing that all you really have is your family, your friends and your community."